ethereal vs gossamer

ethereal is not a noun while gossamer is a noun.

Word	Noun	Adjective	Verb	Adverb
ethereal	No	Yes	No	No
gossamer	Yes	Yes	No	No

As adjectives, ethereal and gossamer are synonyms defined as:

ethereal (noun)	gossamer (noun)
	a gauze fabric with an extremely fine texture
	filaments from a web that was spun by a spider

ethereal (adjective)	gossamer (adjective)
of or containing or dissolved in ether	characterized by unusual lightness and delicacy
characterized by unusual lightness and delicacy	so thin as to transmit light
of heaven or the spirit
characterized by lightness and insubstantiality; as impalpable or intangible as air